Automatic bobbin-changing device for looms



Jan. 17, 1928.

C. VALENTIN AUTOMATIC BOBBIN CHANGING DEVICE FOR LOOMS Filed Oct. 9, 1926 2 Sheets-Sheet 2 ,[nz/ez'o' Cad VleW/ZU'n A.. By 777 l'ljys.

Piend Jan. 17,1928.

UNHTED STATES PATENT qovaie.l

CARL VALENTIN, OF STUTTGART, GERMANY.

AUTOMATIC BOBBIN-CHANGING DEVICE FOB LOOMS.

Application led October 9, 1926, Serial No. 140,546, and in Germany May 29, 1925.

Automatic bobbin changing. devices for looms of the kind with a fixed frame magazine and a rotating thread Aholder are known. The fixed frame magazines of this known 5 kind had generally the form of an inclined bobbin runway, which made it necessary to guide the threads bythe aid of card bands, sprocket chains, belts or the like, which owing to the unavoidable vibration of the l looms were caused to oscillate and execute movements ofltheir own, whereby the threads suspended therefrom became twisted or tangled which easily caused breakage of the threads. The suggestion has been made to l construct the fixed frame magazine as part of a circle, about the central axis of -which the thread guiding disc, which is constructed in the form of a circular disc, makes a parti'l rotationevery time a bobbin is changed, '20 while the bobbins slide forwards in the fixed magazine. The apparatus vwas also so constructed that the concave opening of the circular shaped magazine was turned towards the weavers seat and the magazine projected towards the side of the loom over the slay or hatten. For overshot looms such an arrangement cannot be used, because the path for the picker, arm is then no longer free.

The object of the present invention is to provide a bobbin changing device which can also be used for overshot looms and overcome the above mentioned disadvantages. The invention is substantially characterized by the fact that the convex side of the partly circular shaped magazine is turned towards the weaver, sothat the slay or batten is brought from the concave side of the magazine to the lowermost open point ofthe magazine and the path for the overshot arm is left free. The invention isalso characterized by an improved device-for feeding in the bobbins" andfor securely holding a bobbin until the picker is again in position of rest.

In the accom an ing drawing Fig. 1 is a si e e evation of the apparatus, and

Fig. 2 is a plan view thereof.

In the semi-circular fixed frame 1 lie the bobbins 2, the ends of the threads from which pass over the guide disc 3 and are aiiixed thereto at 4. The operat' shaft carries a-lever 6 which is connected y means of a connecting rod 7. to the shuttle feeler 8,

which is constructed in the form of a bell crank, lThis shuttle feeler, if the shuttle is lnot properly positioned into the shuttle box,

rock or pivot on the bolt'9 and has on its f vertical arm a lug with a curved slot 10 in it, through which a bolt 11 on the introducing lever 12 fits. This introducing lever has a frog-like end in which the bunter 20, which vibrates to and fro with the slay or batten, can engage when themchange of bobbin is initiated. The introducing'lever also carries an'anglesl1aped arm 13. The feed lever 14 for the intermittent rotation of the disc 3 is mounted to move longitudinally at 15 .and has on its-horizontal `limb 16 a notch 16 and onpits vertical limb at the top a feed pawl 17 connected by a pivoted'lever and a locking pawl 18 for operating the ratchet wheel 19, which is connected by the shaft 20 to the thread guiding disc 3. c

vWhen a change of bobbins is initiated in the well-known way and the shaft 5 makes a partial rotation in the direction of the arrow (Fig. 1), the lever 6 swings'upwards and by means of the connecting'rod- 7 4draws the horizontal limb of the angularly shaped shuttle feeler also upwards, whereby the vertical limb of the bell-crank lever 8 swings 'rearward and downward. In this way the lever 12, which is connected by the bolt 11 to the bell-crank lever 8, is brought within range of the bunter 20.

When the loom slay'or hatten moves forward, .the bunter 20 bears against the frog of the lever 12 and pushes it forward. By drawing down the lever 12 the arm .13 connected thereto moves into the notch 16 of the -feed or'ratchet lever 14, 16, and conseqnently the lever is moved in the bearing .15 forward indirectly by the slay or batten.

The forthread-guiding disc connected to it only i takes place after the change of bobbins hasA i been completed. by the pressure of the lever 21 `(connected to the shaft 5) 'on' the feed .lever 14 and moreover at the instant'the bobbin inthe fixed bobbin frame slides downwards. y

If a shuttle has not been properly posi` tioned in the shuttle box; the shuttlepresses the feeler 8 out of the dotted position into no Y that shown by full lines, when the slay or batten moves forwards, whereby the initial novement for operating the thread-holding disc 3 is arrested and no change of bobbin 5, can take place.

I claim 1. In automatic bobbin changing devices for looms, a fixed partly circular frame magazine with its convex side nearest the l0 weaver, a rotating thread guide consisting of a circular disc running concentrically with the axis of the 1nagazine,omechanism for' imparting a partial rotation to the disc and for changing the bobbins comprising .an

2? angle-shaped lever, an introducing ram "l" operating said pawl mechanism and having a mulder engaging the angle lug of the lever arm, and a shuttle feeler with a slotted lug engaging the lever arm to support it in its neutral position, or to bring itl down into a osition opposite or in alignment with the unter when requiring to change a bobbin, and rotate the thread guide.

2. In automatic bobbin changing 'devices for looms, a fixed magazine, a rotating thread guide consisting of a circular disc running concentrically with vthe axis of the magazine, mechanism for imparting a partial rotation to the disc and for changing the bobbins comprising an angle shaped lever,

"-3 an introducing ram pivoted to one end of said lever, a lever arm with a frog-like end and an angle lug, a bunter o n he loom slay, a pawl and ratchet mechanism for turning the disc, a sliding rod operating said pawl mechanism and having a shoulder engaging the angle lug of the lever arm, and a shuttle feeler with a slotted lug engaging the lever arm to support it in its neutral position, or to bring it down into the position opposite or iu alinement with the bunterwhen requiring to change. a bobbin and rotate the thread guide.

3. In automatic bobbin changing devices for looms, a fixed magazine, a rotating thread guide consisting of a circular disc running concentricall'y with the axis of the magazine, means for imparting a partial rotation to the disc and for changing the bobbins comprising a lever, an introducing ram pivoted to one end of said lever, a lever arm with a frog-like end and an angle lug, a bunter on the loom slay, a pawl afnd ratchet mechanism for turning the disc, a rod operating said pawl and ratchet mechanism and having a shoulder engaging the angle lug of the level' arm, and a shuttle fecler to support the lever arm in its neutral position, or to bring it down into position opposite or in alinement with the bunter when requiring to change a bobbin and rotate the thread guide.

In testimony whereof I afiix my signature.

CARL VALENTIN; 

